Which term refers to devices on the wing that increase lift at low speeds by changing wing curvature?

• A. Slats
• B. Flaps
• C. Airfoil
• D. Wings

Answer: (B)

Flaps are devices on the trailing edge that increase lift at low speeds by increasing the wing’s curvature (camber). When you deploy flaps, the trailing edge deflects downward, making the wing more curved. This change boosts the lift coefficient, letting the aircraft generate more lift at slower speeds, which is crucial for takeoff and landing. It also lowers stall speed, improving control when flying slowly.

Leading-edge slats provide a similar lift boost but work differently, by creating a slot at the front to delay airflow separation at high angles of attack. The airfoil is the wing’s cross‑section shape, not a deployable device, and wings refer to the entire structure.